fix local list-targets --json
fix local list-targets --json

Summary: the udid was being overriden here and it was being printed out empty

Reviewed By: CarlaCosenza

Differential Revision: D16666218

fbshipit-source-id: dcbf99716f31d68e3aa98b0d0b0a2718ac45dd3d

facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl